Simvastatin. Molecular model of the drug simvastatin (C25.H38.O5). This lipid-lowering drug is sold under the brand name Zocor. It is used to treat dyslipidaemia and to prevent atherosclerosis-related complications such as stroke and heart attacks in those who are at high risk. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white) and oxygen (red).